Jumptab, a mobile phone ad firm, put together a map of the U.S. (posted here at AllThingsD) indicating in which states each of the three largest smartphone makers tended to do better than their average in sales. Now, according to Jumptap's previous studies, Android is the most popular operating system for smartphones nationally as of July with a 38 percent market share, followed by the iPhone's iOS (33 percent) and Blackberry (22 percent). But certain phones skew higher than their national market shares in the some states. For example, New York has a greater than typical number of Blackberry users, which is likely a reflection of the number of businesspeople working in the state. So does Maryland, Virginia, and the District of Columbia, where many Blackberry-using government-types reside. The reasons driving the regional disparities between Google's and Apple's phones, though, is less clear: the iPhone tends to dominate in New England and the Midwest, while the Android does better than average in the West and some states in the South.